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Add feature to expose vars/defaults with include/import_role (#41330)

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* First pass at making 'private' work on include_role, imports are always public

* Prevent dupe task execution and overwriting handlers

* New functionality will use public instead of deprecated private

* Add tests for public exposure

* Validate vars before import/include to ensure they don't expose too early

* Add porting guide docs about public argument and change to import_role

* Add additional docs about public and vars exposure to module docs

* Insert role handlers at parse time, exposing them globally
This commit is contained in:
Matt Martz 2018-07-15 09:59:30 -05:00 • committed by GitHub
commit 27b4d7ed31
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23 changed files with 145 additions and 9 deletions
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20
lib/ansible/playbook/role/__init__.py
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@ -96,7 +96,7 @@ class Role(Base, Become, Conditional, Taggable):
_delegate_to = FieldAttribute(isa='string')
_delegate_facts = FieldAttribute(isa='bool', default=False)
def __init__(self, play=None, from_files=None):
def __init__(self, play=None, from_files=None, from_include=False):
self._role_name = None
self._role_path = None
self._role_params = dict()
@ -108,6 +108,7 @@ class Role(Base, Become, Conditional, Taggable):
self._dependencies = []
self._task_blocks = []
self._handler_blocks = []
self._compiled_handler_blocks = None
self._default_vars = dict()
self._role_vars = dict()
self._had_task_run = dict()
@ -117,6 +118,9 @@ class Role(Base, Become, Conditional, Taggable):
from_files = {}
self._from_files = from_files
# Indicates whether this role was included via include/import_role
self.from_include = from_include
super(Role, self).__init__()
def __repr__(self):
@ -126,7 +130,7 @@ class Role(Base, Become, Conditional, Taggable):
return self._role_name
@staticmethod
def load(role_include, play, parent_role=None, from_files=None):
def load(role_include, play, parent_role=None, from_files=None, from_include=False):
if from_files is None:
from_files = {}
@ -153,7 +157,7 @@ class Role(Base, Become, Conditional, Taggable):
role_obj.add_parent(parent_role)
return role_obj
r = Role(play=play, from_files=from_files)
r = Role(play=play, from_files=from_files, from_include=from_include)
r._load_role_data(role_include, parent_role=parent_role)
if role_include.role not in play.ROLE_CACHE:
@ -359,7 +363,15 @@ class Role(Base, Become, Conditional, Taggable):
return self._task_blocks[:]
def get_handler_blocks(self, play, dep_chain=None):
block_list = []
# Do not recreate this list each time ``get_handler_blocks`` is called.
# Cache the results so that we don't potentially overwrite with copied duplicates
#
# ``get_handler_blocks`` may be called when handling ``import_role`` during parsing
# as well as with ``Play.compile_roles_handlers`` from ``TaskExecutor``
if self._compiled_handler_blocks:
return self._compiled_handler_blocks
self._compiled_handler_blocks = block_list = []
# update the dependency chain here
if dep_chain is None: